ES2101787T3 - PROCEDURE FOR THE PURIFYING TREATMENT OF REACTION AND / OR WASHING MEANS THAT RESULT IN THE PREPARATION OF CELLULOSE ETERS. - Google Patents
PROCEDURE FOR THE PURIFYING TREATMENT OF REACTION AND / OR WASHING MEANS THAT RESULT IN THE PREPARATION OF CELLULOSE ETERS.Info
- Publication number
- ES2101787T3 ES2101787T3 ES92120720T ES92120720T ES2101787T3 ES 2101787 T3 ES2101787 T3 ES 2101787T3 ES 92120720 T ES92120720 T ES 92120720T ES 92120720 T ES92120720 T ES 92120720T ES 2101787 T3 ES2101787 T3 ES 2101787T3
- Authority
- ES
- Spain
- Prior art keywords
- cellulose
- reaction
- procedure
- eters
- preparation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229920002678 cellulose Polymers 0.000 title abstract 4
- 239000001913 cellulose Substances 0.000 title abstract 4
- 238000000034 method Methods 0.000 title abstract 2
- 238000002360 preparation method Methods 0.000 title 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract 2
- XLYOFNOQVPJJNP-PWCQTSIFSA-N Tritiated water Chemical compound [3H]O[3H] XLYOFNOQVPJJNP-PWCQTSIFSA-N 0.000 abstract 2
- 238000000108 ultra-filtration Methods 0.000 abstract 2
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 239000012141 concentrate Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 239000003960 organic solvent Substances 0.000 abstract 1
- 239000012466 permeate Substances 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B11/00—Preparation of cellulose ethers
- C08B11/20—Post-etherification treatments of chemical or physical type, e.g. mixed etherification in two steps, including purification
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
LA INVENCION CONCIERNE A UN PROCEDIMIENTO PARA EL TRATAMIENTO DEPURADOR DE LOS MEDIOS LIQUIDOS DE REACCION Y/O DE LAVADO, PRODUCIDOS DURANTE LA OBTENCION DE ETERES DE CELULOSA INSOLUBLES EN AGUA CALIENTE, A PARTIR DE CELULOSA, HIDROXIDO ALCALINO Y AL MENOS UN AGENTE DE ETERIFICACION EN UN AGUA, Y EN TODO CASO AL MENOS UN MEDIO CONTENIENDO UN DISOLVENTE ORGANICO, POR MEDIO DE LA ULTRAFILTRACION EN UN PERMEATO Y CONCENTRADO, QUE SE CARACTERIZA PORQUE LA ULTRAFILTRACION DE LOS AGENTES DE REACCION Y/O LAVADO SE REALIZA A UNA TEMPERATURA DE O POR ENCIMA DE LA TEMPERATURA DE FLOCULACION DEL ETER DE CELULOSA.THE INVENTION CONCERNS A PROCEDURE FOR THE TREATMENT TREATMENT OF LIQUID REACTION AND / OR WASHING MEDIA, PRODUCED DURING THE OBTAINING OF CELLULOSE ETERES IN HOT WATER, FROM CELLULOSE, ALCOHOL AND ALCOHOL EARTHWATER. A WATER, AND IN ALL CASES AT LEAST A MEDIUM CONTAINING AN ORGANIC SOLVENT, THROUGH ULTRAFILTRATION IN A PERMEATE AND CONCENTRATE, WHICH IS CHARACTERIZED BECAUSE THE ULTRAFILTRATION OF REACTION AGENTS AND / OR WASHING IS PERFORMED BY A TEMPER ABOVE THE FLOCULATION TEMPERATURE OF CELLULOSE ETER.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4140272 | 1991-12-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2101787T3 true ES2101787T3 (en) | 1997-07-16 |
Family
ID=6446448
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES92120720T Expired - Lifetime ES2101787T3 (en) | 1991-12-06 | 1992-12-04 | PROCEDURE FOR THE PURIFYING TREATMENT OF REACTION AND / OR WASHING MEANS THAT RESULT IN THE PREPARATION OF CELLULOSE ETERS. |
Country Status (7)
Country | Link |
---|---|
US (1) | US5500124A (en) |
EP (1) | EP0545426B1 (en) |
CA (1) | CA2084589A1 (en) |
DE (1) | DE59208547D1 (en) |
ES (1) | ES2101787T3 (en) |
FI (1) | FI925499A (en) |
MX (1) | MX9207037A (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9312219D0 (en) * | 1993-06-14 | 1993-07-28 | Dow Deutschland Inc | Purification of aqueous reaction or washing medium containing cellulose ethers |
US5504201A (en) * | 1994-03-14 | 1996-04-02 | The Dow Chemical Company | Process for recovering salable cellulose ethers from an aqueous medium containing such cellulose ethers |
IT1295832B1 (en) * | 1997-10-28 | 1999-05-28 | Proras Srl | PROCESS AND PLANT FOR EXTRACTION AND CONCENTRATION OF TANNIN FROM WOOD AND OTHER NATURAL PRODUCTS |
DE19941893A1 (en) * | 1999-09-03 | 2001-03-08 | Clariant Gmbh | Low viscosity, hot water flocculable cellulose ethers, processes for their preparation by depolymerization and their use |
ATE336515T1 (en) * | 2001-02-28 | 2006-09-15 | Hercules Inc | METHOD FOR SEPARATING CELLULOSE ETHER FROM AQUEOUS SOLUTIONS USING ULTRAFILTRATION WITH ENHANCED SHEAR EFFECT |
JP4029272B2 (en) * | 2002-03-11 | 2008-01-09 | 信越化学工業株式会社 | Admixture and hydraulic composition for extrusion molding using the same |
KR101137639B1 (en) * | 2004-11-02 | 2012-04-19 | 신에쓰 가가꾸 고교 가부시끼가이샤 | Method of separating water-soluble cellulose ether |
DE102006042438A1 (en) * | 2006-09-09 | 2008-03-27 | Wolff Cellulosics Gmbh & Co. Kg | Process for washing polysaccharide derivatives |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3873518A (en) * | 1973-12-14 | 1975-03-25 | Dow Chemical Co | Water soluble ternary cellulose ethers |
FR2351063A1 (en) * | 1976-05-12 | 1977-12-09 | Rhone Poulenc Ind | STATIONERY EFFLUENT TREATMENT |
JPS5768190A (en) * | 1980-10-13 | 1982-04-26 | Shin Etsu Chem Co Ltd | Treatment of nonionic cellulose ether dissolved waste water |
DE3331997A1 (en) * | 1983-09-05 | 1985-03-21 | Hoechst Ag, 6230 Frankfurt | METHOD FOR PURIFYING AQUEOUS DISTILLATION RESIDUES DURING THE TREATMENT OF LIQUIDS RESULTING FROM THE PRODUCTION OF CELLULOSEETHERS |
US4581446A (en) * | 1985-03-15 | 1986-04-08 | The Dow Chemical Company | Purification of cellulose ethers |
US4830753A (en) * | 1986-04-28 | 1989-05-16 | Rohm And Haas Company | Membrane filtration of cell culture media with charged particles |
JPS6363274A (en) * | 1986-09-03 | 1988-03-19 | Konica Corp | Reader |
US4988807A (en) * | 1989-01-23 | 1991-01-29 | The Dow Chemical Company | Removal of undesirable material from water-soluble polysaccharide ethers |
US5218107A (en) * | 1991-12-30 | 1993-06-08 | The Dow Chemical Company | Removal of undesirable material from water-soluble cellulose ether aqueous solutions |
-
1992
- 1992-12-03 FI FI925499A patent/FI925499A/en not_active Application Discontinuation
- 1992-12-03 US US07/984,698 patent/US5500124A/en not_active Expired - Fee Related
- 1992-12-04 EP EP92120720A patent/EP0545426B1/en not_active Expired - Lifetime
- 1992-12-04 DE DE59208547T patent/DE59208547D1/en not_active Expired - Lifetime
- 1992-12-04 CA CA002084589A patent/CA2084589A1/en not_active Abandoned
- 1992-12-04 MX MX9207037A patent/MX9207037A/en unknown
- 1992-12-04 ES ES92120720T patent/ES2101787T3/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0545426B1 (en) | 1997-05-28 |
FI925499A0 (en) | 1992-12-03 |
EP0545426A3 (en) | 1993-07-14 |
DE59208547D1 (en) | 1997-07-03 |
FI925499A (en) | 1993-06-07 |
EP0545426A2 (en) | 1993-06-09 |
US5500124A (en) | 1996-03-19 |
MX9207037A (en) | 1993-06-01 |
CA2084589A1 (en) | 1993-06-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FG2A | Definitive protection |
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